Idiopathic familial gingival fibromatosis associated with mental retardation, epilepsy and hypertrichosis.

Gingival fibromatosis, a rare but often familial condition, is described in two siblings, associated with mental retardation, epilepsy and hypertrichosis. In one child a maxillary giant-cell tumour was found and excised. It is important to distinguish idiopathic gingival fibromatosis from phenytoin-induced gingival hypertrophy.